10 Best Pool Chemicals 2025 in the United States

The 'In The Swim 3 Inch Stabilized Chlorine Tablets' are designed to keep your swimming pool clean and clear by effectively removing bacteria, algae, and other contaminants. These tablets contain 99% Trichloro-S-Triazinetrione with 90% stabilized chlorine, ensuring powerful and consistent sanitization.

The slow-dissolving formula provides long-lasting protection, making them ideal for use in floaters or automatic feeders. Additionally, the tablets are UV-protected to resist depletion from harmful sun rays, contributing to their efficiency and longevity.

Users should note that while the product excels in chlorine delivery, it does not address other key pool maintenance needs like pH balancing, alkalinity increaser, calcium hardness, or shock treatments. Therefore, you'll need to complement these tablets with additional products to manage all aspects of pool chemistry effectively. Their non-perishable nature and optimal usage within two years of manufacture add to their appeal. The weight and size of the product might be cumbersome for some users, but the benefits of cleaner, safer water could outweigh these minor inconveniences.

The HTH 52037R Pool Care Shock Advanced is a versatile and effective pool chemical designed to address a variety of common pool water issues. Its 4-in-1 formula is a notable strength, as it kills bacteria and algae, reduces chlorine odor and irritation, and restores water clarity quickly. This makes it a convenient option for weekly maintenance, solving most pool water problems within 24 hours, which is ideal for busy pool owners looking for a quick solution.

Additionally, the product is compatible with all types of swimming pools, including vinyl-lined and saltwater systems, providing flexibility for different pool setups. The Cal Hypo formula is efficient at sanitizing the pool without adding cyanuric acid, which helps prevent overstabilization and chlorine lock, a common issue with some other shock treatments.

One potential drawback is that it requires the use of HTH 6-Way Test Strips for optimal results, adding an extra step to the pool care routine. Additionally, while the product is effective, it is also essential to handle it carefully due to its chemical nature. In summary, the HTH 52037R Pool Care Shock Advanced is a strong choice for those looking to maintain a clean and clear pool with minimal hassle, though users should be prepared for regular testing and careful handling.

The In The Swim Pool Shock is a powerful granular sanitizer designed to maintain crystal clear water in swimming pools by defending against bacteria, algae, and microorganisms. It contains 68% Calcium Hypochlorite (Cal-Hypo), providing a high 65% chlorine content, making it effective for routine maintenance.

This product is versatile, suitable for both above-ground and in-ground pools, as well as spas and hot tubs. It is fast-acting for algae control and can be pre-dissolved to prevent bleaching of pool liners. Users are advised to use one pound per 10,000 gallons weekly to maintain proper chlorine levels (5-10 ppm).

With a weight of 27 pounds and dimensions of 11.3 x 11.3 x 10.4 inches, it includes 24 one-pound bags, making it convenient for regular usage. While it has many strengths, including its high chlorine content and versatility, some users might find the need to pre-dissolve or dilute it to avoid liner bleaching as a slight drawback. Nonetheless, it is an effective and popular choice for pool maintenance.